From: Chuck Lever <chuck.lever@oracle.com>
To: Hans-Peter Jansen <hpj@urpla.net>,
Anthony Joseph Messina <amessina@messinet.com>
Cc: Linux NFS Mailing List <linux-nfs@vger.kernel.org>
Subject: Re: general protection fault, probably for non-canonical address in nfsd
Date: Mon, 8 Jun 2020 11:28:53 -0400 [thread overview]
Message-ID: <2B6CBC8C-A1D4-4C39-AF45-958847C99572@oracle.com> (raw)
In-Reply-To: <9727420.yF10LQ635x@xrated>
> On Jun 7, 2020, at 1:44 PM, Hans-Peter Jansen <hpj@urpla.net> wrote:
>
> Am Sonntag, 7. Juni 2020, 18:01:55 CEST schrieb Anthony Joseph Messina:
>> On Sunday, June 7, 2020 10:32:44 AM CDT Hans-Peter Jansen wrote:
>>> Hi,
>>>
>>> after upgrading the kernel from 5.6.11 to 5.6.14, we suffer from regular
>>> crashes of nfsd here:
>>>
>>> 2020-06-07T01:32:43.600306+02:00 server rpc.mountd[2664]: authenticated
>>> mount request from 192.168.3.16:303 for /work (/work)
>>> 2020-06-07T01:32:43.602594+02:00 server rpc.mountd[2664]: authenticated
>>> mount request from 192.168.3.16:304 for /work/vmware (/work)
>>> 2020-06-07T01:32:43.602971+02:00 server rpc.mountd[2664]: authenticated
>>> mount request from 192.168.3.16:305 for /work/vSphere (/work)
>>> 2020-06-07T01:32:43.606276+02:00 server kernel: [51901.089211] general
>>> protection fault, probably for non-canonical address 0xb9159d506ba40000:
>>> 0000 [#1] SMP PTI 2020-06-07T01:32:43.606284+02:00 server kernel:
>>> [51901.089226] CPU: 1 PID: 3190 Comm: nfsd Tainted: G O
>>> 5.6.14-lp151.2-default #1 openSUSE Tumbleweed (unreleased)
>>> 2020-06-07T01:32:43.606286+02:00 server kernel: [51901.089234] Hardware
>>> name: System manufacturer System Product Name/P7F-E, BIOS 0906
>>
>> I see similar issues in Fedora kernels 5.6.14 through 5.6.16
>> https://bugzilla.redhat.com/show_bug.cgi?id=1839287
>>
>> On the client I mount /home with sec=krb5p, and /mnt/koji with sec=krb5
>
> Thanks for confirmation.
>
> Apart from the hassle with server reboots, this issue has some DOS potential,
> I'm afraid.
If you have a reproducer (even a partial one) then bisecting between a
known good kernel and v5.6.14 (or 16) would be helpful.
--
Chuck Lever
next prev parent reply other threads:[~2020-06-08 15:31 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-07 15:32 general protection fault, probably for non-canonical address in nfsd Hans-Peter Jansen
2020-06-07 16:01 ` Anthony Joseph Messina
2020-06-07 17:44 ` Hans-Peter Jansen
2020-06-08 15:28 ` Chuck Lever [this message]
2020-06-08 17:53 ` Hans-Peter Jansen
2020-06-08 18:31 ` Anthony Joseph Messina
2020-06-08 19:27 ` Chuck Lever
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